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Journal of Tropical Oceanography ›› 2013, Vol. 32 ›› Issue (6): 96-100.doi: 10.11978/j.issn.1009-5470.2013.06.014cstr: 32234.14.j.issn.1009-5470.2013.06.014

• Marine biology • Previous Articles     Next Articles

Study on antibiotic-resistance of heterotrophic bacteria from farming water and intestine of Pearl oyster (Pteria penguin) in Lingshui

WANG Rui-xuan1, 2, LIN Yun-si2, GUO Zhi-xun1, WU Kai-chang1, WANG Jiang-yong1   

  1. 1. South China Sea Fisheries Research Institute, China Academy of Fishery Science, Key Laboratory of Fishery Ecology and Environment, Guangdong Province, Key Laboratory of South China Sea Fishery Resources Exploitation and Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangdong 510300, China; 
    2. South China Normal University, Guangzhou 510640, China
  • Received:2012-08-14 Revised:2013-01-18 Online:2013-12-20 Published:2014-01-21

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Abstract:

A total of 514 strains of heterotrophic bacteria (including 281 strains isolated from farming water and 233 strains isolated from intestines of the Pearl oyster) were tested for their resistances to 10 antibiotics by Kirby-bauer diffusion method. Results showed that the resistant rates to chloramphenicol, norfloxacin and ciprofloxacin were all low (below 20%), with the resistant rate to chloramphenicol being the lowest. Many strains resisted furazolidone, penicillin G and rifampin; the resistant rates were all more than 45%. Results also showed that 202 strains from intestines were resistant to more than four antibiotics. These results indicated that heterotrophic bacteria from the Pearl oyster resisted antibiotics seriously and that the multidrug resistant rate was very high. Several strains, which were isolated from both farming water and intestines, even resisted more than nine antibiotics. In addition, the peaks of resistant rates of strains from the farming water were overlapped in March and September. The trends of resistant rates of strains from the farming water and intestines were similar, but the latter was lagged for about two months and was smaller than the former.

Key words: Pteria penguin, farming water, intestine, heterotrophic bacteria, antibiotic resistance

CLC Number: 

  • P745.26